I don't know - that is the thing...

I've pulled off the largest transformer (reasoning that it would be the
HV xmfr) and measured a step-up to ~2.4 kV. I think this was a power
supply for a Kaar transmitter; I don;t recal any power supplies from
that era being built for a variety of transmitters.

BTW, still available.

David Goncalves